Drum-wrap and thread-break lockout for winding machines



Feb. 16, 1965 s. FURsT 3,169,716

DRUM-WRAP AND THREAD-BREAK LOCKOUT FOR, WINDING MACHINES Filed July 26,1962 4 Sheets-Sheet l FlG.l

Feb. 16, 1965 s. FURST 3,169,716

DRUM-WRAP AND THREAD-BREAK LOCKOUT FOR WINDING MACHINES Filed July 26,1962' 4 Sheets-Sheet 2 Feb. 16, 1965 s. FURST 3,169,716

DRUM-WRAP AND THREAD-BREAK LOCKOUT FOR WINDING MACHINES Filed July 26,1962 4 sheets sheet 3 Feb. 16, 1965 s. FURST 3,169,716

DRUM-WRAP AND THREAD-BREAK LOCKOUT FOR WINDING MACHINES Filed July 26,1962 4 Sheets-Sheet 4 United States Patent C 3,169,716 DRUM- ANDTfmEAD-BREAK LOCKOUT FOR ENG MAtZHlNES Stefan Fiirst, Monchen-Gladbach,Germany, assignor to Walter Reiners, Monehen-Gladbach, Germany FiledJuly 26, 1962, Ser. No. 214,789 Claims priority, application Germany,June 11, 1958,

R 23,474 6 Claims. (Cl. 242-36) My invention relates to a testing methodand device for checking continuously the re-winding of yarn in automaticwinding machines and more particularly to a methd and device forstopping a winding station upon occurrence of entanglement or wrappingof the yarn about the yarn guide drum.

This application is a continuation-in-part of my copendapplicationSerial No. 819,092, filed June 9, 1959, now abandoned, and assigned tothe assignee of the present application.

In the manufacture of woven or knitted goods the yarn packages comingfrom the spinning machine in the form of cops are first re-wound ontotake-up spools into larger packages for example in the shape ofcross-wound coils, also called cheeses. During such re-winding, the yarnbeing pulled olf the cop over the cop tip passes along a yarn guidewhich reciprocates the yarn along the take up spool as the yarn is beingwound on that spool. Particularly for high-speed re-winding operation,the yarn guide consists preferably of a rotating drum which has aguiding groove on its cylindrical drum surface. If the yarn, duringwinding operation, tears between the yarn cleaning comb or otherstationary guide member from which it travels onto the guiding drum,then the loose yarn end may become wrapped about the rotating drum orits driving shaft. Such wraps are a source of trouble or danger becausethe slowly increasim wrap may rub against an adjacent machine part andthis may be sufficient even to ignite the yarn. In automatic windingmachines requiring an only slight or occasional amout of personalsupervision, such wraps may also cause a considerable amount of damageto the machinery.

It is therefore an object of my invention to eliminate suchdeficiencies.

It is a further object of my invention to provide means for stopping theoperation of an individual winding station of a winding machineimmediately upon the occurrece of entanglement or wrap of the yarnaround the yarn guide drum and to prevent continuation of the windingoperation at that winding station until the wrap is removed.

Still another object of my invention is to prevent the occurrence ofexcessively large wraps or entanglements of yarn around parts. of awinding machine.

For this purpose, and in accordance with a feature of my invention, Iprovide a method and means for continuously checking the windingoperation in a winding station having a rotating drive shaft or rotatingyarn guide, the supervisory action of the checking device being directedto a given range or ranges adjacent to these rotating parts and beingresponsive to occurrence of a wrap or entanglement of the yarn aroundthose parts, such as the drive shaft or rotating yarn guard, with theresult of performing a controlling or signalling operation. The actionreleased in response to occurrence of a wrap may serve only forsignalling purposes to notify the operator of the need for hisattention, or it may also serve to automatically initiate an operationsuch as a switching or control operation. This latter operation ispreferably such that when the wrap-responsive sensing member becomesactive it immediately causes stoppage of the winding station orseverance of the yarn, for example in such 3,169,716 l atentecl Feb. 16,1965 a manner that the yarn cleaner traversed by the travelling yarn isclosed, such as by electric control means, with the result of causingthe yarn to tear immediately. This has the effect of causing the yarnfeeler of the machine to respond to absence of yarn in the customarymanner, and to cause the winding station to stop.

It is further preferable, particularly in winding machines which areautomated to a large extent, such as with automatic yarn-seekers andknotters, to have the yarnsensing member respond to the occurrence of awrap or to the subsequent severing of the yarn, and to immediately causestopping of the control or switching means which normally serve toreestablish the winding station to operative condition. In this mannerthe occurrence of a wrap not only results in stoppage of the windingstation but also prevents the servicing operation of the yarn-seekingand knotting devices, normally occurring in the event of yarn breakage.Without such automatic prevention of the above-mentioned servicingoperation, by response of the yarn-sensing member, the servicingdevices, particularly in automaticwinding machines, under normalconditions would become activated to exchange a depleted yarn supplycoil or to mend a broken yarn, so as to return the winding station tooperative condition with the effect that the yarn-sensing device wouldrepeatedly operate when a wrap occurred. However, since occurrence ofthe above* mentioned wraps are rare, it is preferable to abstain fromproviding any automatic device for the elimination of such wrap.Preferably, therefore, the continuous automatic surface upon which awrap may possibly be formed. The

testing device is mounted so that it is actuated by the wrap when thelatter slowly increases in thickness on the rotating yarn guide. Forthat reason, the testing device, as a rule, is located opposite the yarnguide in parallel relation to the guide axis. The device can then passupon the drive of the rotating yarn guide or the drive shaft of thewinding station for stopping the rotation; or the testing device, whenresponding, may cause the take-up spool, peripherally driven by theyarn-guiding drum when in normal operation, to be lifted off the drum,thus the winding performance.

According to another feature of my invention, the wrap-responsivesensing member may comprise a beam of light which is directedsubstantially parallel to the axisof the drive shaft or of theyarn-guiding drum and which.

impinges upon a photoelectric cell. The electric circuit of thephotoelectric cell, upon occurrence of a wrap interfering with the beamof light, effects the desired control or stoppage of the windingstation, for example by means of a relay, to arrest the winding stationor in any other suitablemanner to initiate the termination of thewinding operation. In yarn guides of the wing type, the beam of lightmay also be directed in slanted relation with respect to the shaft axis.

According to still another modification feature of my invention, thesensing member of the testing device releases or establishes a latchconnection which causes the winding station to be controlled,preferably, brought to a standstill by means of a switching or controldevice operating with a stronger force or torque than the sensing deviceitself. The sensing member may also act upon the stop-control devicewith which the winding stations are usually equipped and which arecontrolled by operation of the conventional type of yarn guard, thelatter stopping responsive shut-off device; and

being a feelermember'or the like that is normally biasedinto'engageme'nt with the taut yarn running onto the yarn -guidingdrumand deflecting in the event the yarn becomes absent due to breakage ordepletion of the yarn supply coil.

According to still another feature of my invention,

the supervisory control in response to occurrence of wraps is effectedby means of a force-measuring gauge located in the torque transmissiondevice used for driving the winding station and is activated to causestopor torque exceeds a given limit value. The performance of thisdevice is predicated upon the fact that the occurrence'and increase of awrap is accompanied by increasing friction with ,neighboring machineparts which require a corresponding increase in driving power for FIG. 1is a front view of a yarn-winding device in an individual windingstation of a yarn-coil winding ma chine, the device including awrap-responsively controlled stop control mechanism.

FIG. 2 is a partial and partly sectional side view off a modifiedwinding device with wrap-responsive control means.

'FIGS. 3A, 3B and 3C are lateral'views in three respectively dilferentconditions of a third embodiment of such a winding device equipped witha latch mechanism shown in FIG. 1, ajfceler roller/7 is mounted on the'shaft 9 of the intermediate friction roller 3 and is located oppositethe guiding drum 1, preferably in the middle of the drum as illustrated.A spring 8 normally biases the bearing. structure ha of shaft 9 towardthe drum 1 to a position in which the intermediate frictiongear 3engages and entrains the friction gear 2, while the roller' 7 remainsslightly spaced from the drum 1.

. page of the windingstation when the transmitted force If due tobreakage of the yarn Y along its path be tween the tensioner T orcleaner and the guiding drum 1, a wrap W occurs around drum 1, the wrapW presses against the feeler roller? and 'moves it awayfrom the forstopping the winding station in response to the occurrence of wraps. inFIG. 3A the yarn is broken, but no wrap has occurred; in FIG. 3B, a drumwrap has occurred but the'yarn is not broken; in FIG. 3C the tion.

FIG. 4 is an electric circuit diagram of a PilOtOBiC-,

trically controlled group of winding stations.

FIG. 5 'is a front view, partly sectioned, of another embodiment of awinding device provided with a torque- FIG. 6 is a supplemental diagramof cult ofFIG.4.

Before describing the illustrated embodiments. in greater detail, adescription will be given of those feaintermediate drum is shown in itsnormal running posirum 1 in opposition to the force of spring 8, thusdisengaging the intermediate, gear 3 from the friction disk 2 andstopping the winding operation, which can thereafter he continued onlyafter the "wrap W is removed.

In the embodiment of FIG. 2, the ,feeler'roller 7' is journalled on anangular lever 1t) pivoted at a to the 1 frame structure M and biased bya pull spring 11 to keep theroller 7 in engagement with the surface ofthe guid- 7 ing drum '1. An arm 12 of lever it? forms a latch fornormally retaining another angular lever 14 which is pivoted at 14a andbiased-counterclockwise by a pull spring 15. The upper arm of lever 14is connected by a link 14!) with the shaft 341 of "theintermediatefriction Wheel 3'. For thispurposethe link ldbpasses throughan opening in lever 14 and is under the effect of a helical compressionspring 140 which tends to movethe link 1dr) upwardly. Normally, when thelever 14- 'is latched by arm 12 in the position 14', shown by adot-and-dash line, the intermediate roller 3' is forced by spring 14cinto frictional engagement with thedriving wheel 5 and thedriven wheel2.' However, in the event of the occurrence ofa wrap'W; the roller '7 isforced downward by the wrap W so that the latch arm 12 of angular leverill turns counterclockwise into the position illustrated in PEG. 2' andreleases the'lever 14 which then passes, under action of spring 15,through and beyond the illustrated full-line position to a'lower limitposition in which the intermediate roller 3 is disengaged from therollers 5 and 2, thus stopping the winding operation. A re-setting rod16, manually actuable by means of a knob 16a,

permits returningthe angular lever 14 to'the normal posithe electriccirtures which all of the disclosedembodiments have in common. I v t IThe yarn Y pulled off froma spinningcop (not shown) passes through ayarn tensioner T (PEG. 3) or.addi-:

tionally through'a comb-shaped cleaner (not shown) and thence upwardlyalong a'feeler or yarnyguard 24' onto a yarn-guiding drum 1 which isprovided with a groove 1a (PIG. 1) that forms a loop closed upon, itselfand extending about the drum periphery as well as in the longitudinaldirection of the drum so that, during rota tion of the guiding drum 1,the oncoming yarn Y is reciprocated' along a take -up spool 4 thus beingwound into a cross-wound package. The take-up spool 4 is pivotallymounted on a frame 4a (FIGS. 1, '3) which is pivoted at 411 to the framestructure M of the machine.

1 During operation, the take-up spool rests against the periphery of theyarn-guiding drum 1. The shaft lb of which is engageable with anintermediate friction wheel 3 (FIGS.'1, 2, 3). The latter gear isfrictionally'engageable with a friction gear 5 mounted on a shaft 5a.which is drivento continuously rotate at uniform speed as long as thewinding machine is in operative condition.

. Referring now to the embodiment of the invention drum 1 is driven'bymeans of a coaxial friction gear 2, j

tion 14 after the wrap W is removed from the guiding drum. I

FIGS. 3A, 3B and 3C respectively show in lateral view three respectivelydifferent positions of another embodiment of the inventiom in thecondition of FIG. 3A, the situation is illustrated when no wrap windinghas occurred on the yarn-guiding drum 1, but the yarn Y leading from thetensioner T to the take-up spool lis broken so that the yarnfeeler 24has swung out into responded position. "A

fecler lever 17, pivoted a 1170!, extends to the vicinity of theperiphery of drum 2 to check it for the presence of a wrap W (FIG. 35).hen engaged by. a wrap W, the lever 17 turns counterclockwise so that ahook 18 firmly joined with the lever 17 can enter into a catch 18a onacontrol arm 1) to lock the latter into the position illustrated in FIG.3B. The arm '19 is pivotally joined at 1% with a lever 21 rotatableabout a'fixed pivot shaft 22. an extended portion 19b of control arm 1%rests against the cam periphery of an eccentric cam Ztlfixedly mountedon a shaft 24M which, during normal operation of. the machine, is driventogether with the drive shaft 5a to rotate continuously at constantspeed. Theengagement'between arm portion 19b and eccentric 20 is main-'tained by a biasing spring 190. During normal operation the control arm19 oscillates continuously about its pivot C) due to the motion of camat point (FiG The downward force exerted by spring 19c produces acounterclockwise force moment on point 194: acting about shaft'ZZ andalso about the instantaneous contact point between lever 19b and cam 2%.Thus, during normal operation, spring 15% keeps friction roller engagewith rollers 5 and 2. V a

In the condition illustrated in FIG 3A, the yarn feeler 24 has swung outinto responded position and as a result the arm portion 25 of yarnfeeler 24 is placed beneath the arm 19 and prevents downward motion ofthe latter. so that the roller 3 cannot establish a connection betweenthe driving roller 5 and the driven roller 2. The roller 3 is shown inthe condition of FIG. 3A as engaging the roller 2 but not en aging theroller 5.

The intermediate friction roller 3 is journalled in a bifurcated upperportion of a link 23 which is pivotally joined at 23:: with the lever21. As long as the feeler lever 17 does not respond to presence of awrap W on the drum 1, so that the hook 13 remains disengaged from thecatch 13a of the control arm 19, the spring 19c, acting through controllever 19, lever 21 and link 23, maintains the intermediate frictionroller 3 biased upwardly in engagement with the rollers 2 and 5 (FIG.3C) so that winding motion is transmitted to the winding drum. A latchpawl 23b is provided, rotatable about a pivot point 23d fixed to themachine. The pawl 23b is biased by a spring 230 toward the pin 23a. Assoon as the turning motion of lever arm 19 is blocked in the position ofFIG. 3A, by lever 25 in the position of FIG. 3A or by lever 18 in theposition of FIG. 3B, and when the pivot point of lever arm 19 has beendisplaced by motion of cam 20 from point 190' into the full lineposition 19a, the pin 23a is lowered, due to the blockwise rotation ofarm 21, to such an extent that the nose at the lower end of pawl 2231)becomes positioned above and in front of the pin 23:: so that this pinis blocked thereby into the position of FIG. 3C and cannot again belifted until the left end of arm 19 is freed from lever 25 or 18.Consequently, the cam 20 will now rotate idly and will touch lever arm19b only at the cams outermost radial surface, without causing a rockingback and forth of the lever 19 or of intermediate roller 3 When, due tothe presence of a wrap W, the feeler 17 turns counterclockwise into theposition shown in FIG. 3B, upon the next rotation of cam 20 to theposition shown in dotted lines in FIG. 3C, the latch 18 enters into thecatch 18:: of control arm 19 during the corresponding reciprocation ofthis control arm, and the lefthand end 18a of the control arm 19 thusforms a stationary fulcrum with the end of latch 18. As a result, theeccentric 20, during its rotation into the position shown in solid linesin FIG. 3C, acting about the stationary fulcrum of the tip of lever 18engaging catch 180 or about the tip of lever 25, causes the pivot point19a to be lifted from its former position 19a with the effect ofrotating lever 21 clockwise, thus lowering the link 23 and moving theintermediate friction roll 3 downward out of engagement with the drivingwheel 2 and into its position shown in FIG. 3A until the latch 18 or thelever 25 forming the fulcrum is removed from the left end of lever 19.

The control arm 19 cooperates with the yarn guard 24 as shown in FIG. 3Ain the following manner. In the event of yarn breakage, no yarn will bepassing through the yarn guard, and the arm 24, biased by a spring or bya counterweight, turns clockwise about its pivot 24a from dotted lineposition 24' (FIG. 3B) to position 24, 25 (FIG. 3A) and places the stoparm 25 fixedly attached to 24, beneath .the control lever 19 to form afulcrum as mentioned above. This limits the mobility of the lefthand endof the control arm 19 in the same manner as the above-mentioned hook 18latching into catch 18a. Eccentric 20 now lifts the :control arm portion19b to pivot the arm 19 about its stationary fulcrum at the lefthand endthereof where it engages arm 25, thus raising point 19:: from 19a andturning the lever 21 up clockwise about pivot 22, with the result oflifting the intermediate roller 3 off the friction wheel 5 to itsposition illustrated in FIG. 3A. The control arm 19 therefore serves forstopping the winding station not only in response to formation of a wrapW but also in response to absence of the yarn by the action of yarnguard 24.

FIG. 3A illustrates the condition of the machine when no winding wraphas occurred on the yarn-guiding drum 1, but the yarn Y leading to thetake-up spool 4 is broken away from the path Y so that the yarn guard 24has swung out into responded position. As a result, the part 25 becomespositioned beneath the left end of lever 19 and has prevented thedownward motion of the latter, so that the roller 3 cannot establish adriving connection between the driving roller 5 and the driven roller 2.In this condition of FIG. 3A the roller 3 is shown as engaging therolier 2 but not engaging the roller 5.

In the situation illustrated in FIG. 313 a wrap W has occurred, but theyarn Y leading from the tensioner T to the take-up spool 4 has not beenbroken or interrupt ed. The yarn feeler arm 24 normally rests againstthe yarn at position 24' during the winding operation. However, the arm18 in the condition of FIG. 3B has been turned counterclockwise out fromits normal position of FIGS. 3A and 30 because a winding wrap W has beenformed around the yarn-guiding drum 1. The latch nose of lever arm 18therefor has passed beneath the upper nose of the lever arm 19 andcaught into the latch 18:: so that now again the lever arm 19 is held inthe position shown in FIG. 3B in a manner similar to that held by arm 25in FIG. 3A. This prevents the roller 3 from establishing a connectionbetween the driving roller 5 and the roller 2. Simultaneously, the lowernose on the left end of arm 19 is positioned in front of the arm 25 ofthe yarn guard 24 (see FIG. '33) so that the yarn guard 24 can no longerturn out into the responded position of FIG. 3A, even though the yarntension along path Y' may decrease or slacken.

As is customary in winding machines of this type provided with ayarn-seeking and knotting device, the device which seeks, entrains theyarn ends and knots them together enters into action only when the yarnguard, such as 24, is located in responded position, as illustrated inFIG. 3A, because of yarn breakage or absence of yarn.

For a more detailed explanation and illustration of such seeking andknotting devices actuated by the response of a yarn feeler to absence ofyarn, reference may be had to the following patents: Patent No.2,685,414 of S. Fiirst, issued August 3, 1954; Patent No. 3,059,867 ofS. Fiirst, issued October 23, 1962; Patent No. 3,070,320 of Reiners etal., issued December '25, 1962; Patent No. 3,067,962 of S. Ftirst,issued December 11, 1962; Patent No. 3,061,216 of S. Fiirst et al.,issued October 30, 1962; Patent No. 3,023,974 of S. Fiirst, issued March6, 1962; Patent No. 3,077,311 of S. Fiirst, issued February 12, 1963;and Patent No. 3,136,494 of S. Fiirst, issued June 9, 1964.

When the winding machine is stopped because the yarn wrap W has formedon the yarn-guiding drum 1 as illustrated in FIG. 3B, the turning-outmotion of the yarn guard 24 is prevented as above described. Thisprevents the yarn-seeking and knotting devices from entering intooperation. Thus, according to another feature or" the present invention,the yarn feeler 24 which checks for presence of yarn along the yarn pathand responds to absence of yarn so as to put the yarn-seeking andknotting device into operation for the purpose of correcting the yarnfault and again placing the winding station into operation, when suchfeeler 24 is blocked, then the yarn-seeking and knotting devices areprevented from entering into operation until the yarn Wrap has beeneliminated from the yarn-guiding drum 1.

FIG. 3C shows the relative position of the members during normaloperation when no yarn wrap is present on the yarn-guiding drum 1 and noyarn breakage has occurred. In this situation, the yarn guard 24 as wellas the yarn guard 17 are in their normal operating positions. The springbiases the lever arm 19 downward, together with both ends of this leverarm located at the left and right of the pivot point 19a. Consequently,the pivot point 19:: which links arm 19 to lever 21 is also pulled downby the spring 19c into the position designated by 19a. As a result, theroller 3 engages the roller 2 and also the roller 5 so that a drivingconnection is established between roller 5 through the rollers 3 and 2to the yarn-guiding drum 1. By rotation of the cam disc 20, the lever 19swings about the pivot'point 19a, between the solid and dotted-linepositions of lever arm 19 designated in FIG. 3C. Under the eifect of cam20, the lever 19 can be lifted at its left end toia point where eitheror both arm 25 and arm 18 can block the downward motion of the left endof double lever 19. This can only'occur when lever 19 is in thedotted-line position shown in FIG. 3C. When such a blocking action ofthe left end of lever 19 has occurred, either because of loosening ofyarn Y or yarn breakage according to FIG; 3A or because of a yarn wrap Waccording to FIG. 313, then the left end of lever arm 19 becomes afulcrum as above described for the movement of arm 19 by means ofeccentric cam because this left end of arm 19 can no longer movedownwardly. Such blocking action can occur only when the'eccentric cam20 has reached the dotted-line position of FIG. 3C. When the cam 20rotates'fully, the right end 19b of lever 19 is lifted, whereby thelever arm 19 no longer can pivot about the point 19a, but rather aboutthe fulcrum formed by the abutting location between levers 18 or 25, andlever 19, as is represented in FIGS. 3A and 3B. Thus, further rotationof cam 20, lifting lever arm 19 about such fuling current sourceattached to the terminals '43.

onto the mirror 36c and the prism set 370. Consequently, thephotoelectric cell 33 is obscured at this time,

so that the circuit ofthe' cell jand hence-the relay 34c become activeto stop the windingstation 1C. The pho- Qtocell 33 and relays 34a to dare connected at terminals? Stoppage of the winding station may beelfected by 7 having the relay 34c act upon an electromagnet orsolecrum, causes the pivot point 19a to be lifted so that it reaches theposition 19a. This has the effect of interrupting the driving connectionbetween roller 5 through rollers 3 and 2 to the drum 1. Since the cam 20then continues rotating, a latch 23?) is provided to engage the end oflever 21 at 23a and thus prevent the action of spring 190 fromkeepingarm 1% in contact with the rotating cam 20 and pulling arm 1911 downagain. The lever arm 21 is thus blocked by the latch pawl 23b in theposition shown in FIGS. 3A and 3B, but not in theposition of FIG. 3C.Consequently, when latch 23b is engaged with lever 21, the point 19acannot become lowered back intoits full-line position 19a as the cam 20to or connected for rotation of yarn-guiding drums 1A,

1B, 1C, ID of the four illustrated winding stations. The rotatingcontact device 32a to d possesses a contact segment for each individualwinding station, and during each full rotation of the shaft 1b and ofthe guiding drums makes contact only once with an appertaining brushcontact 42a to d. The samecontact device 32a to d operates during thesame interval of time to connect a photoelectric cell .33, common to anumber of winding stations, into another electric circuit. other circuitincludes respective relays, or solenoids 34a to d correlated to therespective winding stations and acting when energized to disengage thestop control device such as friction roller 3, thus stopping therespective winding drum 1A to 1D. Mirrors 35a to d and 36a to d as wellas sets of prisms 37a to d are provided for I guiding the beam of lightfrom light sources 31a to d respectively, so that it scans only the oneguiding drum in which a light source 31 and relay .34 aresimultaneouslycnergized, i.e. while the respective roller 3 isdisengaged from the drum 1A to 1D. If a wrap W has formed, for example,on the guiding drum 1C, as illustrated in FIG. 4, the beam of lightcoming from source 31c, after deflection at mirror 35c, impinges uponthe wrap W at W and thus prevents the beam from passing dnum 1 by meansof which the stud is adustable.

noid which pulls member 23 (FIG. 3) downwardly to remove theabovementioned intermediate roller 3, 3 or 3 (FIGS. 1, 2, 3) from itsdriving engagement with members 2, 5 of the winding station. Thisstoppage of the windingstation may also be effected in a knownmanner bylifting the take-up spool frame 4a, as is more fully disclosed in mycopending application Serial No. 704,983, filed December 24, 1957, nowabandoned, and assigned to the assigneeof the present invention. Afurther method of stoppage is by interrupting the electric circuit ofthe motor driving the winding station by disengagement of electricalcontacts in the motor circuit. V

The embodiment of FIG. 4 may be applied to the type of automatic windingmachine provided with a multiplicity of winding stations, such a is morefully disclosed and described in my Patent No. 3,077,311, and assignedto the assignee of the present invention.

Another method of stoppage according to the invention is by the use of aforce-measuring or torque-measuring device operatively connectedto thepower transmission 5a or solenoid to disengage a roller 3 of aparticular winding station. The force-measuring gauge thus controlsthe'winding station to terminate the winding operation when apredetermined force-limit or torque value is exceeded. FIG. 5illustrates a device of this type having a slip clutch.

In the embodiment of FIG. 5, the driving power is transmitted to thedriving gear 2 through a friction gear The gear 2 is firmly connectedwith a hollow shaft 51, for example by means of a screw bolt 52. Mountedon the left end of the hollow shaft 51 is a claw, clutch 53. Theyarn-guiding drum 1 can slide on the hollow shaft 51, but it isentnained when the teeth of the clutch member 54 engage the interspacesof the clutch member 53. The clutch member is guided on rails 55 whichare firmly. joined with the guiding drum 1. The clutch member 54 isunder the force of a spring 56 which braces itself against a stud orabutment 57. The stud 57 is in threaded engagement with a recess of theguiding A control rod 58 passes through the hollow shaft 51 and isconnected on its left side with a shoulder ring 59 and on the right sidewith a force-transmitting shoulder ring 60. A cap 61 firmly seated inclutch member 54 abuts against the shoulder ring 59. The ring 60cooperates with a lever 62 which can actuate a pair of electric contacts63, 64 and, by means of an angular extension 65 can act upon thefriction gear 3 for the purpose of dis- 1 engaging it from the drivinggear 2. The forked lever 123, on which wheel 3 is mounted, is pivoted atits remote end to the machine frame and is normally biased upwardly tourge friction gear 3 against friction gear 2.

When the driving torque is too great, the two clutch members 53, 54 aretoo strongly loaded to remain in mutual engagement. The clutch member54' moves against the spring 56 and then entrains a control rod 58 bymeans of the shoulder ring 59. The displacement of rod'58 is transmittedby shoulder ring 60 to the lever 62 which lifts the friction gear 3 offthe gear 2. A latch 66 pivoted at 66' biased counterclockwise by acompression spring 67 then arrests the lever 62 in thedrive-disconnecting position until the winding station can again be putinto operation by hand or automatically after elimination of thedisturbance. Simultaneously, the contact pair 63, 64 closes an electriccircuit which issues a signal or calls upon human or mechanicalassistance for eliminating the disturbance.

The openation of the device according to FIG. 6 cor- .respondsessentially to that of FIG. 4. However, the

solenoid is shown in greater detail relative to its operation. When oneof the relays 34 is energized, the core 134 transmits its motion throughthe lever arm 135 to a control rod 136 which, in turn, lifts thefriction gear 3 off when a wrap is present, as is illustrated at thewinding station C. As a result, the drive for Winding station C isdisconnected. A motor 140 supplies driving power and acts through ashaft 141 and the driving gears 142 to drive the individual windingstations.

It will be obvious to those skilled in the art, upon studying thisdisclosure, that my invention permits of a great variety ofmodifications and hence may be embodied in devices other thanparticularly illustrated and described herein, without departing fromthe essential features of my invention and within the scope of theclaims annexed hereto.

I claim:

1. In a winding machine having a rotating yarn guide and drive means forrotating said yarn guide, first sensing means laterally disposedadjacent to said yarn guide and responsive to the presence of a wrap ofyarn around said yarn guide, second sensing means responsive to absenceof yarn travelling to said yarn guide, said drive means includingfriction roller means engageable with said yarn guide for rotating thelatter during normal operation, drive-disconnecting means comprisinglever means operatively linked to said roller means for moving same intoand out of engaging position with said yarn guide, biasing meansconnected to said lever means for urging the latter in a predetermineddirection, and latch means operatively connected to at least said firstof said sensing means and biased for locking said lever means andthereby said roller means out of said engaging position upon response ofsaid first sensing means, so that as long as a Wrap of yarn existsaround said yarn guide said roller means will remain out of saidengaging position to stop the winding operation until said Wrap of yarnis eliminated.

2. A device for stopping the winding operation in a yarn-winding machinehaving a cylindrical rotating yarn guide upon occurrence of wrap on thelatter, comprising drive means for rotating said yarn guide about itsaxis, said drive means including friction roller means engageable withsaid yarn guide for rotating the latter, drivedisconnecting meanscomprising lever means operatively linked to said roller means formoving same into and out of engaging position with said yarn guide,biasing means connected to said lever means for normally urging saidroller means into said engaging position, sensing means laterallydisposed adjacent to said yarn guide and having a portion thereofdisposed in the vicinity of the surface of said cylindrical yarn guidefor actuating said sensing means into a responded condition uponoccurrence of a wrap of yarn around said yarn guide, and latch meansoperatively connected to said'sensing means and biased for locking saidlever means and thereby said roller means out of said engaging positionupon movement of said sensing means into said responded position, sothat as long as a wrap of yarn exists around said yarn guide said rollermeans will remain out of said engaging position to stop the windingoperation until said Wrap of yarn is eliminated.

3. A device for stopping the winding operation in a yarn-winding machinehaving a cylindrical rotating yarn guide upon occurrence of wrap on thelatter, comprising drive means for rotating said yarn guide about itsaxis, said drive means including friction roller means engageable withsaid yarn guide for rotating the latter, drivedisconnecting meanscomprising lever means operatively linked to said roller means formovingsame into and out of engaging position with said yarn guide, firstsensing means disposed adjacent to said yarn guide, feeler means fixedlyattached to said first sensing means and having an end portion thereofdisposed in the vicinity of the surface of said cylindrical yarn guidefor actuating said first sensing means into a responded condition uponoccurrence of a wrap of yarn around said yarn guide, second sensingmeans pivotally mounted and movable in response to absence of yarntravelling to said yarn guide, said first sensing means having firstlatch means engageable with one end of said lever means for providing afirst fulcrum for pivoting of said lever means, second latch meansfixedly attached to said second sensing means and engageable with saidone end of said lever means for providing a second fulcrum for pivotingofsaid lever means, said first and second latch means engaging saidlever means end only upon said first and second sensing means moving inresponse to a yarn Wrap and absence of yarn, respectively andcontinuously rotating cam means for periodically moving said lever meansinto the range of said first and second latch means, whereby uponengagement of one of said latch means with said one end of said levermeans said cam means pivots said lever means about one of said fulcrumsto withdraw said friction roller means from its engaging position withsaid yarn guide to stop the latter, so that as long as a Wrap of yarnexists around said y-arn guide said roller means will remain out of saidengaging position to stop the winding operation until said Wrap of yarnis eliminated.

4. In a winding machine having a rotating yarn guide and a drive meansfor rotating said yarn guide, and equipped with a yarn feeler responsiveinto responded condition upon loosening and absence of yarn travellingalong a yarn path to said yarn guide, drive-disconnecting meanscomprising a device for stopping the winding operation upon occurrenceof said loosening of yarn and for blocking said yarn feeler in itsresponded condition, said drive means including friction roller meansnormally engageable with said yarn guide for rotating the latter, levermeans operatively linked to said roller means for moving same into andout of engaging position with said yarn guide, biasing means connectedto said lever means for urging said roller means into said engagingposition, said drive-disconnecting means being operatively connected tosaid yarn feeler for actuation thereby to place said drive means out ofoperative condition while said yarn feeler is in said respondedcondition.

5. In a Winding machine having a rotating yarn guide and drive means forrotating said yarn guide, a device for stopping the winding operationupon occurrence of a wrap of yarn around the yarn guide, comprisingsensing means laterally disposed adjacent to said yarn guide andresponsive to the presence of a Wrap of yarn around said yarn guide,said drive means including friction roller means engageable with saidyarn guide for rotating the latter during normal winding operation,drive-disconnecting means comprising lever means operatively linked tosaid roller means for moving same into and out of engaging position withsaid yarn guide, biasing means connected to said lever means for urgingsaid roller means into said engaging position, and latch meansoperatively connected to said sensing means and biased for locking saidlever 'means and thereby said roller means out of said engaging positionupon response of said sensing means, so that as long as a wrap of yarnexists around said yarn guide said roller means will remain out of saidengaging position to stop the winding operation until said wrap of yarnis eliminated.

6. In a winding machine having a rotating yarn guide and drive means forrotating said yarn guide, first sensing means laterally disposedadjacent to said yarn guide and responsive to the presence of a wrap ofyarn around said 'yarn guide-second sensing means responsive to absenceo f yarn travelling to said yarn guide, said drive means includingengaging means for rotating the yarn guide during normal operation, saidengaging means being movabie 'into and out'of yarn guide rotatingcondition, drive predetermined direction, and latch means connected toat least said first of said sensing means and biased for locking saidlever means and thereby said engaging means I out of said yarn guiderotating condition upon response or" said first sensing means, sothat'as long as a wrap'of yarn exists around said yarn guide 'isaidengaging meansv will remain out of said yarn guide rotating condition soas to stop the Winding operation until said wrap is eliminated V v v n IReferences Cited in thefile of'this patent UNITED, STATES PATENTS V'znoaoss, 'McKean June 25, 1935 2,338,914 {:Esser et a1. Jan. 11, 1944

1. IN A WINDING MACHINE HAVING A ROTATING YARN GUIDE AND DRIVE MEANS FORROTATING SAID YARN GUIDE, FIRST SENSING MEANS LATERALLY DISPOSEDADJACENT TO SAID YARN GUIDE AND RESPONSIVE TO THE PRESENCE OF A WRAP OFYARN AROUND SAID YARN GUIDE, SECOND SENSING MEANS RESPONSIVE TO ABSENCEOF YARN TRAVELLING TO SAID YARN GUIDE, SAID DRIVE MEANS INCLUDINGFRICTION ROLLER MEANS ENGAGEABLE WITH SAID YARN GUIDE FOR ROTATING THELATTER DURING NORMAL OPERATION, DRIVE-DISCONNECTING MEANS COMPRISINGLEVER MEANS OPERATIVELY LINKED TO SAID ROLLER MEAN FOR MOVING SAME INTOAND OUT OF ENGAGING POSITION WITH SAID YARN GUIDE, BIASING MEANSCONNECTED TO SAID LEVER MEANS FOR URGING THE LATTER IN A PREDETERMINEDIRECTION, AND LATCH MEANS OPERATIVELY CONNECTED TO AT LEAST SAID FIRSTOF SAID SENSING MEANS AND BIASED FOR LOCKING SAID LEVER